91611333912 has 32 divisors (see below), whose sum is σ = 261746668800. Its totient is φ = 26174666784.

The previous prime is 91611333911. The next prime is 91611333923. The reversal of 91611333912 is 21933311619.

It is a super-2 number, since 2×91611333912² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91611333911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272652612 + ... + 272652947.

It is an arithmetic number, because the mean of its divisors is an integer number (8179583400).

Almost surely, 2^91611333912 is an apocalyptic number.

It is an amenable number.

91611333912 is an abundant number, since it is smaller than the sum of its proper divisors (170135334888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91611333912 is a wasteful number, since it uses less digits than its factorization.

91611333912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545305575 (or 545305571 counting only the distinct ones).

The product of its digits is 26244, while the sum is 39.

The spelling of 91611333912 in words is "ninety-one billion, six hundred eleven million, three hundred thirty-three thousand, nine hundred twelve".